wieso klappt die Formel nicht?

[matlat]

Willst du es so haben?
{F}_{{p} ortho {v}}`=`{L}_{p}+m{g}_{{p} ortho {v}} `=`(L^2 - L'^2 )^(1/2)-{mg sin(%theta) hat{j}} cdot ({{hat {k}} times vec{{v} over {v}}})({hat{k}} times vec{{v} over {v}})